https://www.medicare.gov/sign-up-change-plans/get-parts-a-and-b/when-sign-up-parts-a-and-b/when-sign-up-parts-a-and-b.html Feb. - Aug., 2017 http://www.pbs.org/newshour/making-sense/12-secrets-maximizing-social-security-benefits-new-rules/ 62 - 70